When I insert the complete querystring into the NavigateUrl tag this
hyperlink works fine within the GridView.

<asp:HyperLinkField HeaderText=" Details"
NavigateUrl="~/Admindetail.aspx?ku_id=1" Text="Details"

If I try to let the parameter data be provided dynamically something strange
happen. I can see that the dynamical data is provided, with the right ku_id,
but the aspx file is removed from the URL

<asp:HyperLinkField DataNavigateUrlFields="ku_id" HeaderText="Details"
NavigateUrl="~/Admindetail.aspx?ku_id={0}" Text="Details" />

The first code gives something like

www.mysite.com/Admindetail.aspx?ku_id=1

this works OK

The second code gives something like

www.mysite.com/1

Am I configuring it incorrect?

TIRislaa